33rd Pope of the Catholic Church
Papacy: January 31, 314 to December 31, 335
Western feast day is December 31st; Eastern feast day is January 2nd.
Ordained by Pope St. Marcellinus
Council of Nicea
(Emperor) Constantine did not unilaterally convoke the Council (of Nicea). Instead, as the sixth ecumenical council, the Third Council of Constantinople (680-681), declared centuries later, Constantine and Pope Sylvester assembled the Council at Nicaea.
Pope Sylvester I was represented by two papal legates, Roman priests named Victor and Vincent, and almost certainly by Bishop Hosius. (T)he two legates signed the conciliar decrees first. By custom, the priests should have signed only after the bishops, but their pre-eminence as papal representatives demanded the deference of the council fathers.Sources